Machine for forming washers



Nov. 111, 1924- A. H. MAGNUSON MACHINE FOR'FOHMING WASHERS Filed Feb. 21 I92} 2 Sheets-Sheet 1 Nov; 11, 1924.

A. H. MAGNUSON MACHINE FOR FORMING WASHERS Filed Feb. 21 192] 2 Sheets-Sheet 2 Patented Nov. 11, 1924-.

UNETEE, STATEF AXEL I-I. MAG-NUSON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO DE GOMA LEATHER SPECIALTY COMPANY, OF WORCESTER, MASSACHUSETTS, A COR.-- I

IE'ORATION OF MASSACHUSETTS.

MACHINE FOR FORMING WASHERS.

Application filed February 21, 1921.

To all "whom it may] concern:

Be it known that 1, Axial. H. Macrrosoiv, a citizen of the United States, residing at Worcester, in the county of lVorces'ter and Commonwealth of Massachusetts, have invented a new and useful Improvement in a Machine for Forming lVashers, of which the following, together with the accompanying drawings, is a specification.

My invention relates to machines for forming washers and has for its object to provide a machine of the above described type that is characterized by a high rate of production, and is adapted first to automatically sever the washers from the waste stock, and then to sort out the perfect washers from the imperfect ones. These and other advantageous features of my invention will hereinafter more fully appear, reference being had to the accompanying drawings, in which Figure 1 is a view in side elevation of a machine embodying my invention.

Figure 2 is a view in front elevation of a 1 portion of the machine shown in Fig. 1.

Figure 3 is an enlarged front view, partially in section, showing my improved feeding and punching devices.

Figure 4 is a. view in side elevation of the parts shown in Fig. 3.

Figure 5 is a fragmentary view in section, showing the punching device at the end of its downward stroke. I 1

Figure 6 is a sectional view of the punching device shown in Fig. 3, the section being taken on line 66, Fig. 8. f i I Figure 7 is a bottom plan view of the parts shown in Fig. 6, with the'punches and stripis mounted a base member 8.

pers removed.

Similar reference characters refer to similar parts in the different figures.

Referring to Figs. 1 and 2, the machine generally comprises a pair of upwardly extending side frames 1 and 2, between which A shaft 4 is journalled at the top of the base member 3 and is provided with a pulley 5, by means of which it may be driven from a suitable source of power, not shown. The shaft 4: is provided with a crank portion 6 that is connected to a tool head T by means of a J rod 8.-

Serial No. 446,724.

Rotation of the shaft 4 is adapted to trace.

cause reciprocation of the tool head 7 on suit- E able slides 9, the base 3 being provided with a work supporting plate 10, arranged substantially at right angles to the line of movement of the tool head 7. The parts of the machine described thus far form no part of the present invention, and it is to beunderstood that any other similar machine embodying a reciprocating tool head may be employed.

My invention resides in the provision of improved feeding, cutting and punching devices to be used in connection with a machine of the above described type, and which will now be described.

,Referring to Fig. 8, a pair of fluted feed rolls 11 and 12 are rotatably mounted between the arms 13 of a bracket 14: which is secured to the plate 10. The rolls 11 and 12 are connected by gearing 15 and the shaft 16 of the roll 11 is extended to provide a seat for a ratchet wheel 17. A pawl member 18 is pivotally mounted on the end of the shaft 16 and is connected to an eccentric disk '19 mounted on the driving shaft 4:, by means of a rod 20. Rotation of the shaft 1 imparts an oscillatory movement to the pawl member 18 which causes the shaft 16 to be roated intermittently. The roll 12 is adapted to'be driven simultaneously with the roll 11 to deliver a sheet 21 in the direction of the tool head 7 as indicated by the arrow. A tool block 22 is provided with a shank 23 that is received in a recess 24 provided in the tool head 7 A clamping plate 25 and bolt 26 are provided for securing the tool block 22 in position on the tool head 7; A plurality of punches 27 are mounted in side by side relation on a plate 28 that secured to the tool block 22 by means of a retaining member 29. The tool block 22 is also provided at its ends'with gui'de sleeves Y wardly below the ends of the sleeves 30 and is provided with a plurality of openings for receiving'the punches 27.

As best shown in Figs. 6 and 7 cutting edges 36 are formed on the lower face of the cutter block 34 by bevelling off the material surrounding the ends ofthe openings 35, as indicated at 37. The cutting edges 36, thus provided, are circular in form and adjacent cutting edges 36 are connected by crosscutting edges 38 which substantially coincide with the central longitudinal axis of the cutter block 34.

Referring again to Fig. 3, a plurality of strippers 39-ar'e slidably mounted in the openings 35 in the cutter block and are mounted onia stripper plate 40 by means of pins 41. The stripper plate 40 rests loosely in the slot 29 on the cutter plate when the. tool head is in its upper position, and proj'ectsatits ends beyond the cutter plate 33, for a purpose to behereinafter described. Thestrip-peis extend below thecutting edges 36 and are substantially flush with the ends of the punches 27 The strippers 39 are counterbored to receive enlarged portions of the punches 27, and extend upwardly into openings 43-provided in the retaining member 29.

lVhen the tool head 7 moves downwardly on the slides 9, it carries the entire punching device supported upon the tool block 22 and the sleeves 30. The sheet 21 fed by the rolls l1 and 12 is engaged simultaneously by the several pairs of punches 27 and strippers 3'9, whereupon the strippers 39 are forced upwardly while the punches 27 penetrate the sheet.

As best shown in Fig. 5, a die plate 44 supports the sheet 21 and is provided with a plurality of bushings 45 for receiving the punches 27, after they pass through the sheet 21. As the tool block 22 continues its downward movement, the cutting edges 36 and 38 engage the sheet 21' and are driven into the sheet, while the plate 40 moves to thetop of the slot 29 in member 29. The parts of the punching device then occupy the position shown in Fig. 5, the strippers 39 then being forced upwardlv into the openings 43 to allow the cutting edges to cut through to the die plate 44. The tool head 7 is then at the lowest point of its downward stroke.

the tool head 7 starts on its upward stroke, all parts of the cutting device move with the tool block 22 and the severed waslr ers 46 which have been cut from the sheet 21 are withdrawn therefroi'n, the parts still occupying the position shown in Fig. 5. The washers 46 will be completely severed from the sheet 21 owing to the fact that the straight cutting edges 38 extending between the circular cutting edges 36 out the sheet 21 between the washers, and thereby prevent any crap material from being lifted up with the cutter block 34 as the tool block 22 starts to move upwardly.

As the toolv block 22 completes its upward stroke, the projecting ends of the stripper plate 40 are engaged simultaneously by bolts 47 which are carried by lugs 48 secured to the base 3. As the upward movement of the tool block 22 continues, the stripper plate 40 is forced downwardly, and the strippers 39 force the severed washers out of the openings 35 in the cutter block 34. The strippers 39 also strip the washers 46 off the punches 27 and the washers 46 drop into a receiving device which will now be described.

Referring to Fig. 4., a scoop shaped member 49 is provided with lugs 50, by means of which the member 49 is pivotally supported on a pin 51. Springs 52 are connected to the lugs 50 and tend to maintain the upper edge of the scoop' member 49 in engagement with the bottom of the cutter block 34. As the tool head 7 moves downwardly the edge of the tool block 22' is adapted to engage the lugs 50 and force the end of the scoop member 49 away from the cutter block 34, so that the scoop member 49 will not interfere with the operation of the punches 27 and the cutting edges 36. l/Vhen the cutter block 34 moves upwardly with the severed washers 46, the spring 52 tends to return the scoop member 49 to its original position, so that when the strippers 39 strip the washers off the punches 27 they drop into the upturned end of the scoop member 49.

Referring again to Fig. 1, the inclination of the scoop member 49 is such that the completed washers 46 slide downwardly to a sorting frame The frame 53 is provided with a screen 54, the mesh of which is small enough to prevent the passage of perfect washers therethrough. The screen 54 extends the length of the frame 53, the lower end of which is provided with a slot 55 through which the perfect washers may pass to a receptacle 56. A second screen 57 is provided below the screen 54, the mesh of the screen 57 being small enough to prevent the passage of imperfect washers while allowing only small portions of washers to drop into a receptacle The screen 57 terminates above a third receptacle 59.

The frame 53 is pivotally supported its upper end onv a shaft 60, and a rod 61 is attached to the frame by means of which the frame may be given an oscillatory movement about its pivotal support. The movement of the frame is generally up and down, as indicated in dotted lines, and as its lower end strikes the receptacle 59 with considerable force, the washers on the screens 54 and 57 are caused to move clownwardly in a series of short jumps. Perfect washers are delivered by the screen 54 to the receptacle 56, while imperfect washers on the screen 57 fall into the receptacle 59. Such imperfect washers are formed when the cutting edges fail to cut out a complete circle owing to the irregular form of the sheet 21.

Referring again to Fig. 4:, a work holding plate 62 is mounted on a pivot pin 63 which is received in an elongated slot 64. A pair of fingers 65 project upwardly from the plate 62 and are bifurcated at their ends to receive the rods 31. Springs 66 are secured to the plate 62 and serve to hold the I right hand end of the slot 641 in engagement with the pin 63. As the tool block 22 moves a downwardly the shoulders 32 on the sleeves 3O engage the fingers and thereby cause the plate 62 to turn about its pivot pin 63 and engage the portion of the sheet 21 which has passed beyondthe cutter block 3st. The plate 62 is made of a yieldable material, so that the fingers 65 may continue to move downwardly on the rods 31 after the plate 62 has engaged the sheet 21. The outer edge of the plate 62 is adapted to be forced aside by the bevel portion 37 of the cutter block 3 1 as it approaches the sheet 21, this movement being permitted by the slot 64.

As the tool block 22 starts to move upwardly, the waste portion of .the sheet 21 is still tightly held by the plate 62 until the punches 27 have been entirely withdrawn. \Vhen the sheet 21 has passed completely through the machine, the waste remaining is released by the plate 62 and 'falls into a trough 67 which delivers it to the receptacle 58, as shown in Fig. 1. i

From the foregoing, it is apparent that I have provided an improved washer forming device that is adapted to produce washers in large quantities with the expenditure of a minimum amount of labor. My improved tool is adapted to operate as a unit in punching, cutting, and then stripping the severed washers from the punches. The strippers 39 are positively operated, without the use of springs or any other devices that are liable to get out of adjustment and are adapted to completely strip the washers from the punches 27. The pivoted scoop member 49 receives the washers as they are stripped off, and should any washers tend to adhere to the bottoms of the strippers, the edge of the scoop will scrape them off when the latter is forced aside on the downward stroke of the tool block, as shown in Fig. 4:.

This action of the scoop member in clearing the strippers before each operation of the punches is very advantageous, particularly when the material punched is of an oily or sticky nature, such as leather. The adherence of a washer to a stripper on the downward stroke of the punches would probably result in the breaking of some part carried by the tool block.

The provision of a plurality of cutting edges 36 on a single block 34 is also particu larly advantageous, for it allows the punches 27 to be placed closer together than would be possible with a separate cutter for each punch, thereby making it possible to form more washers from a given area of material. The unitary cutter block also provides the transverse cutting edges 38 for severing the material between adjacent ,washers; v

The use of a sorting frame in connection with my improved washer scoop insures that only perfect washers will be delivered to the receptacle 56, while imperfect washers are delivered to receptacle 59, thus making it unnecessary to sort the washers by hand.

While I have shown my improved washer forming device in connection with a particular type of punching machine, it isobvious thatit may as readily be applied to practically any machine having a reciprocating tool head, and I desire therefore that only such limitations be imposed thereon as come within the scope of the appended claims.

I claim, j

1. I11 a machine of the class described, the combination with a support for a sheet of material and a reciprocatory tool for severing and removing a washer from said sheet, of means for stripping the washer from the tool and other means for conveying it away therefrom when the tool is in its upper position. I

2. In a machine of the class described, the combination with a support for a sheet of material and a reciprocatory'tool for severing and removing a washer from said sheet, of means for stripping the washer ion from the tool as it moves away from the sheet, and other means adapted to be interposed between the tool and the sheet when the tool occupies its upper position, for re ceiving the washer as it drops from the tool.

3. I11 a machine of the class described, the combination with a support for a. sheet of material and a reciprocatory tool for severing and removing a washer from said sheet and then stripping it, of a pivotally mounted scoop adapted to operate between the tool and the sheet for receiving the washer as it is stripped from the tool.

4. In a machine of the class described, the combination with a support for a sheet of material and a reciprocatory tool for severing and removing a washer from said sheet and then stripping it, of a pivotally mounted scoop member adapted to move between the tool and the sheet for receiving the stripped washer, the said member being actuated by the movements of the tool.

5. In a machine of the class described, the combination with a support for a sheet of material and a reciprocatory tool for severing and removing a washer from said sheet and then stripping it, of a pivotally mounted scoop member adapted to move between the sheet and the tool, as the latter tory tool. for severing and removing a washenil rom said sheet, of means actuated by the movementof said tool for holding Said sheet during the operation. of the tool thereon and while said sheet feeding means is inoperative.

8,111 a machine, of the class described, the, combination with means for intermit tently feeding a sheet of. material into the path of movement of a reciprocating tool.

' of tool controlled means for holding said sheet after it has passed beyond the path of movement of said tool and when said sheet feeding means is no longer operative thereon.

9,. In a machine of the class described, the combination with a device for intermittently feeding a sheet of material into the path of movement of a reciprocating tool, of means controlled by said'too1 for holding the sheet while said feeding device s inoperative.-

10. In a machine of the class described, a washer forming tool comprising a plurality f Plmches and a cutter block pro vided with circular cutting edges surrounding said punches, the said cutting edges being joined by other cutting edges extending longitudinally of the block.

11, In a machine of the class described, a washer forming tool comprising a plurality of punches and a single cutter block, provided with a plurality of cutting edges each surrounding one of said punches.

12. In a machine of the class described, a washer forming tool comprising a plurality of punches and a single cutter block, prot ided with a plurality of openings extending thcrethrough for receiving the said punches the material surrounding each of said openings being cut away to provide a plurality of cutting edges. 13.111 3, machine of the class described, a washer forming tool comprising a plurality of punches, a cutter block provided with circular cutting edges each surrounding one of said punches, and a plurality of stripper sleeves surrounding said punches Within said block, and adap ted to collapse into said block when the cutting edges on gage the work.

Signed this 12th day of February, 1921.

AXEL H. MAGNUSON.

IVitnesses NELLIE VHALEN, PENELOPE COMBERBACH. 

